mat.services/Caddyfile

{
	# fly.io handles HTTPS for us
	auto_https off
}

http://static-mat-services.fly.dev {
	redir https://mat.services
}

:8080 {
	root * {$SITE_ROOT}
	encode gzip
	file_server

	handle_errors {
		@404 {
			expression {http.error.status_code} == 404
		}
		rewrite @404 /404.html
		file_server
	}

	log {
		output stdout
		output net {$LOG_OUTPUT_ADDR} {
			dial_timeout 1m
		}
	}

	header {
		# disable FLoC tracking
		Permissions-Policy interest-cohort=()
		# enable HSTS
		# currently ramping up max-age as per https://hstspreload.org/
		Strict-Transport-Security max-age=2592000; includeSubDomains
		# disable clients from sniffing the media type
		X-Content-Type-Options nosniff
		# clickjacking protection
		X-Frame-Options DENY
		# keep referrer data off of HTTP connections
		Referrer-Policy no-referrer
		# content security policy
		# style-src 'unsafe-inline': syntax highlighting in codefences
		# sandbox allow-popups: enable target="_blank" links to open in new tabs
		Content-Security-Policy "default-src 'none';
      img-src 'self';
      style-src 'self' 'unsafe-inline';
      font-src 'self';
			script-src 'self';
      form-action 'none';
      frame-ancestors 'none';
      base-uri 'none';
      upgrade-insecure-requests;
      sandbox allow-same-origin allow-popups allow-popups-to-escape-sandbox"
	}

	# caching
	route {
		header /style/* Cache-Control max-age=31536000, immutable
		header /image/* Cache-Control max-age=31536000, immutable
		header /font/* Cache-Control max-age=31536000, immutable
		header Cache-Control max-age=180
	}
}